The evolutionary past of living organisms can be investigated not only from the remains of fossils, but the comparison of common structures such as anatomical, molecular, developmental, and genetic helps us to reconstruct the history of life. After t ...
The evolutionary past of living organisms can be investigated not only from the remains of fossils, but the comparison of common structures such as anatomical, molecular, developmental, and genetic helps us to reconstruct the history of life. After the prebiotic (before life) synthesis of organic polymers in early Earth conditions, the evolution of cellular characteristics by chemical selection followed the arrival of the first living life about 8.3 billion years ago. Genetic changes with time have led to morphological and physiological differences that separate one species from another.
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